Core-making machine.



(1.1. MICHELS.

CORE MAKING MACHNE.

APPLscATloN FILED 1AN.18. 191s.

l ,282,099. Patented Oct. 22, 1918.

3 SHEETS-SHEET 2.

0.1. MICHELS. CORE MAKING MACHlNE. APPLlcTioN min JAN. 1a. ma.

Patented Oct. 22, 1918.

3 SHEETS-SHEET 3 UNITED sfrarns afi-nr r fron CHRISTOPH J. MIGHELS, OFPORT WASHINGTON, WISCONSIN, ASSIGNOE-TO GILSON? MANUFACTURING COMPANY, ACORPORATIONzOF WISCONSIN.

CORE-MAKING MACHINE.

Specification of Letters Patent.

Patented Oct. v1918'.

Application led January 18, 1918. Serial No. 212,520.

To all whom t may concerm.

Be it known that: I, CHnIs'rorH. J. Mror-inLs, a citizen of the UnitedStates, residing at Port l/Vashington, in thecounty of Ozaukee and Stateof Visconsin, have invented new and useful Improvements in Core-MakingMachines, of which the followingt is .a specification.

This invention relates to core making machinesgand the objects in vieware topreduce-a comparatively simple and inexpensive machine for thispurpose which after being` started by hand will autoinaticaily completeits operation of forming the core.

Other objects andadvantages ofthe invention will` hereinafter appear,and the novel features thereof willbe more partie ularly pointed out.inthe appendedclaims,

Referring to the drawings:

Figure l is a side elevation of a core inaliing machine embodying myinvention, the parts beingA shown inytheir inoperative position asbefore the machine is started;

Fig. y2 is, a similar view of the machine, the parts beingshowninftheposition they occupy, after the machine has been started andthe`sand-hopper.r has reachedthe rear end of the core-plate andi itsdischarge closed;

Fig. 3 is aufrontfelevation of the machine, the parts being shownas inFig. 1;

F'g. 4i is a fragmentary sectional view taken. onthe line fL-t of Fig.6;

Fig. is a fragmentarysideelevation, the view being taken at the oppositeside of the machineshown inFigs; 1 and 2; and

Fig. 6 is atop `plan view, the,` parts-being in theposition shownl iinFig.` 1.

Similar numerals of reference indicate similar parts throughout ktheseveral tignres of the drawings.

ln ordertoesupport the mechanism hereinafter described, l employ a rpairof oppesitely-loca'ted side frames 1, the same being suitablylbracedfvand secured together as is customary in such' cases Fromtheirlongitudinal middles, these side frames extendl preferably on`divergentflines for a portion of their lengths, as-at l, beyond whichthey:

again extendparallel to eachother, as atll, theseA latter portions, aswillhereina'fter aps pear, forming supports for bea-ringsy that carrythe driving mechanism;

The rear parallel portions of the?, frames 1, support the core-plate 1l,the'samev having the usual molds or cores-2, which, ofcourse, vary astoshape in accordance with the character of the core it is desired toform. This plate is removablyT supported and'sc-z cured upon thet framesin any desired manner, in the present instance by companionhinge-members 3, the samebeing separablev and lconnectedpivotallytogether by. removable pintles. In this manner core-plateshaving otherfshaped openings or molds may be substituted for that shown,or, if' anyl plate is to be continuously used, after form'- ing thecore, the plate maybe swung upward fer conveniently removing the cores.

Extending forwardly from the rear parallel portions of the sides 1, andwith their upper edges in the sameplane as the upper surface ofthecore-,plate is anextensionor table 5, the saine being situated betweenthe diverging:portion-s1L orf-the frames or sides, such extensiontherefore forminga continuation of the upper surface ofthe coreplate.

At one side ofthe machine, at its front, is located a bearing-frame 7,andj upon the upper end ofthe same and at corresponding points uponeachy of the sides 1, are locatedv transversely. aliningfbearings 9, inwhich is located a drive-shaft 10,' carrying' spurgearsy 11 and 12,which' are fast upon and therefore move with the shaft.

Similar bearings 8, arel located on the bearing-frame 7 and the adjacentside-frame 1, and in such bearings is journaled a shortercounter-shaft13. This shaft carries pulleys la and 15, and between the same smallspur-gears 16 and 17, theformer mesh'-v ing with the spur-gear 11, andthe latter with the spur-gear 12, and therefore adapted to drive thesamein accordance with the di'- rection of rotation of said counter-shaftand as will ibehercinafterexplained. The adjacent-ends of the hubs ofthe" small gears '1G and?! 17 aretoothed, as at` I6 and 17a, re"`spectively, while the opposite ends of the hubs constitute the malemembers 18, of friction-clutches, the opposite companion or femalemembers, 19, being formed in the sides of the pulleys 14 and 15. Thepulleys, it will be understood, are constantly rotated but in reversedirections, suoli being possible by reason of them being loosely mountedon the counter-shaft and as are similarly mounted the gears 16 and 17Between the smaller gears 16 and 17, there is slidably mounted on theshaft 13, a clutchu collar 20, centrally annularly grooved, as at 22,and having its opposite ends toothed, as at 21, and adapted to engagethe teeth of either the gear 16 or 17, in accordance with the directionof movement of the collar.

Pivoted, as at 24, preferably to the front standard of the side-frames,is a bell-crank operating-lever 23, such having at one end an upwardlydisposed arm 25, terminating between the small gears 16 and 17, at whichpoint said lever is bifurcated or slotted, as at 26, to engage theannular groove 22 of the sliding collar 20, and thereby adapted tooperate the latter in either direction upon the shaft 13. The oppositeend of the lever extends at one side of and at the front of the machineand terminates in a convenient handle 27.

Adjacent this handle, the lever 23 is pivoted, as at 28, to the lowerend of a vertically moving gravity locking-bar 29, located at one sideof the machine and supported in any suitable manner so as to be free toslide, in the present instance, by a keeper 30, attached to the frame ofthe machine and overlapping the said bar. At its front edge the bar isprovided with an angular notch 31, with which is adapted to engage theangular shoulder 33, of a gravity latch 34, pivoted as at 35, to theframe in advance of the bar. At the upper end of the bar is located aloose roller 32, the function of which will hereinafter appear.

Carried by the shaft 10, between those bearings 9 that are located uponthe sides 1 of the frame, are small gears 36, and supported thereon andmeshing therewith are two parallel raclnbars 37, of somewhat greaterlength than the frame of the machine. rlhat rack-bar at the side atwhich the gravity locking-bar 29 is located is provided with a trip37a,which, when the bars 37 move inward to a proper point, as hereinafterexplained, will contact with the upper end or tail of the latch 34 andthereby disengage its shoulder from its locking position with thegravity locking-bar and perthe same to fall by its own weight. rl`hesame rack-bar also carries upon its upper side and in rear of thelocking-bar 29 an inclined cam 37b, which as it moves forward, willengage under the roller 32 Leashes and therefore elevate thelocking-'bar 29 so as to rengage the latch 34 therewith.

Near their rear ends, the rack-bars 37 are provided with bearings 38,for the reception of a journal or shaft 39, upon which is mounted aroller 40, for compressing'the sand in the core-plate. l/Vhen not inoperation the compressing-roller 40 is supported upon the extension ortable 5;

immediately in rear of the roller, the racl-bars 37 support thesand-hopper 41. This hopper is formed with a lower reduced discharge-end42, provided with a sliding cut-ofi" or gate 43. A scraper 44, may belocated at the rear side of the discharge 42, the function being toscrape 01T any surplus of sand as well as distribute the same over thecore-plate.

Projecting to one side and forwardly a short distance from the cut-off43, is a bent rod 45, at the forward end of which is located an l.shapedblock 46, theV lower extremity of which is slotted and hasintermediately pivoted therein, as at 47, a gravity latch 48, the innerend of which, when the latch is raised, is adapted to engage with anotch 49, formed in the adjacent rack-bar 37, thereby locking the rodand the cut-oli from movement. An inclined cam a, is located in the pathof the tail of the latch andis adapted to elevate the latch into itslocking position with the rack-bar at the proper point of the operationof the machine. (See Figs. 4 and A coiled spring 50, has one endattached to the arm 46 of the rod 45, and its opposite end to theadjacent rack-bar 37, the function of the spring being to open thecut-off to permit the iiow of sand when the cut-ofi'l is not locked bythe gravity latch 47.

A striker-bar 52, is pivoted, as at 53, to the rear end of the machinein the path of the cut-oft operating rod 45, and is adapted when thehopper has reached the rear end of the core-plate, to contact with saidrod and` force the cut-oh" forward to its closed position, therebypreventing waste of sand from the hopper. rlhis strilrenbar ispreferably yieldingly pressed forward by means of a coiled spring 54.

This completes the description of the construction of the mechanismpreferably employed to attain the objects of the invention, it beingunderstood that the same is subject to variations as to details. Theoperation may be brieiiy described asfollows: Y

Taking the parts in the position in which they are illustrated in Figs.1v and 6, the handle, 27, is raised,`thereby causingV the teeth of thesliding-sleeve, 20, to engage the companion teeth of the hub of thesmall spur-gear, 16, and force the male-member, 13, thereof intofrictional engagement with the female-member, 19, of the pulley 14, thuscausing ,the shaft tovrotatein therdirec- Y hence the'inner end of thelatch is disengaged from the notch 49 of adjacent rackbar. The. springthen opens the cut-oit 43 of the sand hopper41, kso, that sand isdischarged overtheA core-plate and into the molds,y the scraperxlserving to carry the surplus into the molds, as will be readilyapparent.y yAs the rack-bars andv hopper move to the' rear, thel latteris followed by the compressiiiroller 40, which serves to pack thesandinto the molds. By the time the roller 40ha's reached the rear endof the core-plate, the cut-.oit yielding to the iniiuence of thestriker-bar 52,y which latter has' a limitedrearwardmovement, will beclosed or moved forward when `said cut-off will again become'y locked bythe latch 48 /rengaging with they notch `a9. At this point-when thehopper is at its rearmo'st position-the trip 37a Vcontacts with theupper end or tailQof the gravity latch 34, rocking said latch" so as todisengage its shoulder 33 from the angular notch 31 of the gravitylocliing-barQQ, so that the latter will fall by gravity. As thisbai'drops, thel lever 23 is moved'V in thel opposite direction, or, in otherwords', its' handleend is depressed, so that the sliding'sleeve 2O ismoved in an opposite direction, thus releasing/the friction-clutchformed between the gear' 16 andthe pulley 14, and establishing suchclutchl between the gear 17 and the pulley' 15, therebyY reversing theydirection of rotation of the shaft 10, it being understood that the twopulleys are loose upon the shaft y13 and are continuously driven inopposite'directions. This operation will rotatethe shaft `l() and itsgears 36 in the opposite direction to that described, thus causing thereturn movement of the rackbars 37 and returning `the sand-hopper andthe roller to their initial positions. As the parts return, the rollerragainjopei'atesv over the corel-plate, and the cam` 37b engaging underthe roller '32, relevates the. gravity locking-bar 29 until the notch 31of the latter is engaged by the latch' 34.

This completes the operation of the machineand it only remains to swingthe coreplate upwardly upon its hinges, remove the cores, and repeat theoperation.

It will be observed that the machine is very simple both in constructionand operation and by its use the production of cores isgreatly're'duced' as` to y' cost, in that all manual labor in connectionwith such production is reduced to ya. minimum, itA simply beingnecessaryto start the machine andl later, at the completion of theoperation of Y the machine, remove the cores from the coreplate.

Having described my invention, what l claim, is:

1. In a core-making machine, the combisV nation with auframe, of acore-plate located thereon, a sand-hopper also located on the a frameand adapted to move over the same, a compressionroller mounted on theframe in rear of the hopper, and means for -reci'procating the hopperand roller over the coreplate.

nation with a frame, of a core-plate iiXedly supported thereon, asupport on the frame on a level with the upper surface of the coi-e- 2.In a core-makingZmachine, the combiplate, a sand-hopper rsupported abovethe frame and adaptedtc move over the same and the core-plate, acompression-roller connected with and adapted to move in rear ot thesand-hopper over thecore-plate and supported by the support, andV meansfor reciprocating the sand-hopper and roller.

3. In a coremalring machine, the combination with a frame, of acore-plate supported on the latter, a hopper, means for supporting thehopper above and out. of

contact with said plate and frame, means for reciprocating the hopperover the cora plate, a cut-oit at the lower discharge end of the hopper,means yfor opening the cut-off when the hopper is advanced and directlyY over the core-plate andV for closing the cut- A oil' during as well assubsequentl toV its return Y movement, a compressing-means, and meansVfor operating said coinpressing-ineans automatically and between theadvance and ieturn movements of the hopper.

4;. In a core-making machine, the combination with a frame, of acore-plate mounted thereon, a movable hopper, means for reciprocatingthe sameover-the core-plate,

opening at the end of said advance move-V ment.

thereon, a reciprocating hopper provided with a lower discharge-end, acut-ofi' located in saidkend, means for reciprocating :the hopper, andmeans for opening the cut-oit at the beginning of the advance movement5. In a core-making machine, the combi-f nation with a traine, of acore-plate mounted izo of the hopper and for closing said cut-oil atthey end of said movement. p

6. In a core-making machine, the combination with a Jframe, of acore-plate mounted thereon, a hopper supported above the traine n andplate and providedwith a lower dis-Y charge-end, `means torreciprocating .the`

hopper, a sliding cut-ofi mounted in the discharge-end of the hopper, aspring for normally opening said cnt-off, means for locking the cut-offclosed, a trip for disengaging said loch at the beginning' of theadvance movement of the cut-0H, and a striker located in the path of thecut-otl for closing the same against the spring at the end ot theadvancemovement of the cut-oli'.

7. in a core-making machine, the combination with a frame, of acore-plate mounted thereon, a drive-shaft journaled in the frame, gearsCarried by the drive-shaft, means for rotating the shaft in reversedirections, opposite parallel rack-bars mounted on the gears, a hoppercarried by the rack-bars and adapted to be reciprocated thereby over thecore-plate and having a lower discharge-end, a cut-oil in saiddischarge-end, and means for opening the cutoff at the beginning andduring the advance movement of the hopper and for closing and lockingthe same at the end of such movement, during its return movement, andwhen at rest.

8. In a core-making machine, the combination with a. frame, of acore-plate mounted thereon, a drive-shaft `iournaled in the frame,opposite gears carried by the driveshaft, means for rotating the shaftin reverse directions, opposite parallel rack-bars mounted on the gears,a hopper carried by the rear yends of the raclrbars and adapted to bereciprocated thereby over the coreplate and having a lowerdischarge-end, a cut-olil in said discharge-end, means for opening thecut-0E at the beginning and during the advance movement of the hopperand for closing and locking the same at the end of such movement, duringits return movement, and when at rest, bearings carried by the rack-barsin rear of the hopper, and a roller having its journal. in said bearingsand supporting the rear ends of the rack-bars on the frame.

9. ln a core-making machine, the combination with a frame, of acore-plate supported thereon, bearings carried by the frame in front ofthe core-plate, a drive-shaft journaled in the bearings, companion gearscaryried by the shaft, means for rotating the shaft in oppositedirections, opposite rackbars engaging and operated by the gears, asand-hopper supported by the rack-bars and having a lower discharge-end,a sliding cut-o in said discharge-end, a bent arm connected to thecut-oh1 and extending to one side of the same, an intermediately pivotedlatch carried by the outer end of said arm, a notch in the adjacentrack-bar with which the inner end of the latch is adapted to engage,whereby the cut-o is locked against opening, a spring for normallyopening the ycnt-od when the latch is disengaged :from

aeeaoee below the hopper, drive-gears mounted on the shaft at one sideof the companion gears, a counter-shaft, gears loose thereon and 1n meshwith the drive-gears and provided at' one side with clutch-members andat their inner sides toothed, pulleys loosely mounted on thecounter-shaft and driven vin. opposite directions and havingclutch-1nenibers adapted to coact with those of the gears of said Ycounter-shaft, a sleeve mounted for sliding upon the counter-shaftbetween the gears thereof and having its opposite end toothed to engagethose of either of the gears and provided with an annular groove, abellcrank lever ulcrumed on the frame and at one end terminating in abifurcation engaging the annular groove of the sleeve and at itsopposite end in a handle, ar vertically movable gravity locking-barlocated in the frame and having its lower end pivoted to the bell-crankand above the same having an angular notch, a loose roller at the upperend of said bar, a gravity latch pivoted to the frame and adapted toengage the notch of the bar when the bar is elevated, an inclined camcarried by the rack-bar adjacent` the said bar and adapted to engageAunder the loose roller thereof and elevate the bar when the rack-barsare moved toward the front of the machine, whereby the direction ofrotation of the drive-shaft of the machine is reversed, and a tripcarried by said rack-k bar and adapted to disengage the latch from itslocking position with said bar.

1l. ln a core-making machine, the combination with a frame, of acore-plate supported thereon, a sand-hopperl supported above in line butout yof contact with the core-plate and provided with adischarge in Yits lower end communicating with the coreplate, a valve in the dischargeof the hopper,`

means for relatively moving the core-plate and hopper out of alinementwith each other, and means for automatically operating the valve in thehopper so as to open the same when the core-plate and hopper aline andkto close the valve when the core-plate and hopper are out of alinement.

l2. ln a core-making machine, the combif nation with a frame, or acore-plate supported thereon, a sand-hopper supported ich above in lineWith but out of contact with the core-plate and frame and provided witha discharge in its lower end leading to the core-plate, a valve in thedischarge of the hopper, means for relatively moving the core-plate andhopper-discharge out of alinement with each other, means forautomatically operating the valve in the discharge so as to open thesame When the core-plate and opper aline and to close the valve when theCopies of this patent may be obtained for iive cents each, by

core-plate and hopper are out of alinement, a compressing means for thesand discharged from the hopper into the core-plate, and means forautomatically operating said compressing-means after each discharge of15 sand from the hopper.

CHRISTOPH J. MCHELS. In the presence of- H. W. BoLENs, T. A. BOERNER.

addressing the Commissioner of Patents,

Washington, D. C.

